Rotary-switch stopping circuit



Dec. 18, 1951 c. PAPPAZOGLU ROTARY-SWITCH STOPPING CIRCUIT Filed April 20. 1949 s I l I I J luvs/woe Co/vsm/vr/N P/IPPHZOGLU firro RIVEYSJ Patented Dec. 18, 1951 FHQE- $579,333 7 norAnx-sm ron STOPPING CIRCUIT Gonstantin Pappazoglu, Saint-Cloud; France; assigner: to Compagnie lndils't'rielle' Des Telephonesfariss Erance, a French corporation Application ApriLZD, 1949, Serial No. 88,588

In France April 20; 1948 This invention relates-to an improvement'in stopping. circuits of the rotaryswitches having a mark'ing'multiple common to several markin devices: It." is applicable to distant communi cation automatic exchanges provided with find-- mg. and. selecti'ngmembershunting completely over their contact studbanks in a simple move-- mentand in which meanssuch as registers or similar control circuits: are utilised wh-i'clfii providesfor the orientation of'the members through a marking'arrangement; The: simultaneous calls whichmusti be provided for necessitate the simult'aneous: positioning of several devices; the orien tationiof: each of them calling for a-mark ing I de-' vice independentof 'theothers.

Certain marking systems compriseto this chest" at splitting: of the marking multiples; and each ofrthesex multiples is affected to a marking d'evice; either. permanently-"or temporarily through a finder; theroperations can therefore onlytake place: successively on these? splitted multiples.-

The drawbacks of the splitt'ed marking mul In all considered case's'zthe consequence is that thezimport'ance. of the equipment is increased; in-

asmuchJa'sJthe device's operate in small groups of" re'ducedlefliciency certairrsystems-even require that all memberswhich have become available revert to a rest position, the consequence 'being amunduesweano'fi the apparatusparts;

Whenait: isrdesire'd; however, to enable any registerito orient Lanyselector, a-- connection be tween these devices must; be efiected through' a; common marking multiple.- The: simultaneous operationsiof several'registers:cantlien take place u-nderithe condition thatthe indepenrlence oi the marking-circuits. is provided for; This invention enable'sv to:- utilize one marking:- mul ti ple only commonto all selectorsand markihg d'evices and nevertheless to detect and -render inoperative any entangling of: test and stopping circuits taking place," owing to severalsupply sources being' con nected" in series; during'th'esimultaneous op-- eration'of any registers i'nthe-process of marking It'achieves the independenceof the circuits 'oy i precluding the operation of a marking circuit when the: selectonmet 'is not that to which the register has beenconnected so asto -achieve-the communication: the-circuit entanglements have thus no longer any influence; since each 'ofthese 1 claim (01. 17918:)

. 2- circuits can only operate when the markingis normall'yestablished between the register and'the selector'it controls at that moment.

Theinvention willb'e described 'with reference tothe-accompanying drawings, in which:

Fig: 1 shows a known arrangement, to; which the inventionhas not'been applied, of acommon marking multiple utilised in the invention.

Fig. 2- shows a protective device according to the invention;

Fig; 3" shows the arrangement of'Fi'g. 1, after it'has been provided'with the de'vice according to Fig; 2? g In Figs l'two selectors'only' S1 and S2 registers El" and E2" have been shown; the reg'isterE-l" is'connecte'ci tothe'selectorS-l in known manner through its chooser and the circuit of connection.- Noneofthe'se members has been represented? it is to operate;

The line-bundles are designated to the selectors by theregisters or" similar circuits owing" to the direction marking devices D l and'DZ', which are nu'merical' switches' locat'ed in the registers and whose homologous contact studs 383 and 403',

305 and 405, etc. are strapped as shown' and con-- nected to the different control wires: ofithe com-" mon marking multiples m2; mt, etc. The suit-'- able orientation of all selecting memberscanthusbe effected from any register;

The conditions in which the simultaneoous hunting of the selecting members. can take place show that the independency of thesuppl-ysourcesv is not sufiicient to prevent the formation of en As will be: shown hereinafter, errors in the determination: of a direction may take place, it being possible tangled test and stopping circuits.

that a: selector *is' stopped by the register" asso ciated' therewithb'ut on a position"designatedby" anotherregisterz' Electro-magnets RH and R2! (Fig; 1) provide fcr'therotation of selectors Si and" S2,v of. which only"the brushes CSI and CS2 have been shown, eachof wh'ich'hunts over the contactstuds of one bank; which are distributed in four groups" in" the example"illustrated,v one contact stud only of'ea'ch groupbein'g shown at b tob'M, 122'! to" bZ'fi; these two selectors are. controlled by" the direction marking, devices 'DI and. D2; which are operatedh'y' the registencircuits of which they" 3 are part, and each of which is represented by one of its brushes llll, 482 only; each of these marking devices designates a marking wire.

The selectors have no rest position and there fore start from any position at the moment of marking. If the wire ml were not multipled, the brush CSl could only stop on the contact stud hi3 through the following process: when the brush CSl reaches hi3 it energizes Al through the circuit: pole+ of Ul, Al, brush MII and con-* tact stud 385 of Dl, contact studbl3, brush CSI and pole of Ul; Al, being excited, opens, at MS, Rll of Sl, which stops; under similar conditions S2 would stop on b2l designated by the marking device D2.

But the homologous brushes of Sl and S2 are multipled, also those of D! and D2, and there may become established: the circuit shown in the figure, namely: pole+ of Ul, Al, brush llll of DI, contact stud Z223, brush CS2, poleof U2, pole+ of U2, A2, brush 482 of D2, contact stud bll, brush CS8, pole of Ulv The selectors SI and S2 then stop on wrong positions: bl l instead of M3, M3 instead of 192i. This mixing of circuits is caused by the two identical sources Ul and U2 and the two identical relays Al and A2 being arranged symmetrically and therefore at the same voltages.

The invention relates to a system which prevents the formation of such a circuit by destroying this symmetry. According to the invention, each register comprises the following elements:' connected. in series, the brush of the marking device, a first relay, a contact of this relay, a contact of a second, two-winding relay, an electrically insulated battery and a connection between said battery and the brush of a selector; shunted on the exit of said first relay and the contact of said second relay a winding of said second relay; shunted on the contacts of said relays, a condenser and a resistance mounted in series; shunted on the entry of the first relay and the exit of the battery, a rectifier and the second winding of said second relay; theresistance oi the winding of said first relay and the resistance of the second winding of said second relay being higher than the resistance of the first winding of said second relay.

The parts of the register which have just been enumerated are shown in Fig. 2, in which they are designated as follows:

D: marking device;

400: brush of the marking device; A: first relay;

al contact of relay A;

B: second, two-winding relay;

bl contact of relay B;

U: electrically insulated battery; 1:: condenser;

y: resistance;

300 designates a contact stud of the marking device, S the selector, CS the selector brush, b2li a selector contact stud, a2 a second contact of relay A and C the connection relay. I

Fig. 2 corresponds to the normal operation, that is, without entangling, of a register. The current flows through the circuit: pole+ of U, bl, al, A, brush 4B4] of D, contact stud 309, marking wire m, contact stud b2!) and brush CS of the selector S, pole of U. Relay A is energized and stops at al the rotation of the selector as has been mentioned; it causes the short-circuit of the upper winding of B to be cut at'al and operates C at a2. Relay B can not attract its armature completely because its energizing circuit, which is connected in series with relay A, is opened at bl; B therefore vibrates, and its vibration frequency is chosen sufflciently high that A may be kept energized owing to the charging current of the condenser placed at the terminals of the contact bl.

C, when it operates,'brings about the connection through a contact not shown; replacing contact all! of relay Al of Fig. 1; it also brings about, through a contact not shown, the disconnection of relays A and B.

To the elements al, a2, bl, :r, y and R of Fig. 2 correspond in Fig. 3 the following elements re spectively: M2 and a22, all and a2l, M1 and M1, ml and r2, yl and g2, RI and R2. In Fig. 3 as in Fig. 1 Al and A2 are operated in series through the following circuit: pole+ of Ul, bl'l, al2, Al, brush 4M of Dl, wire ml, contact stud b23, brush CS2 of S2, pole of U2, pole+ of'U2, 2221, 1122, A2, brush 402 of D2, wire m2, contact stud bl l, brush CSl of Sl, poleof Ul. But this circuit is destroyed through the following process: Al and A2 open the short circuits of the upper windings of BI and B2 and insert them into the above circuit instead of al2 and 1122; the lower windings of BI and B2 are without influence so long as contacts bl'l and 1221 are closed, since they are connected to points at the same voltage; if one of contacts DH and 1221 opens, the lower winding of the corresponding relay is subjected to the voltage of the insulated battery of the other system and the relay attracts its armature completely; bll being open, the circuit is established as follows: pole+ of U2, contact b2'l, upper winding of B2, A2, brush 402 of D2, wire 1712, contact stud bll, brush CSI of SI, lower winding of El, rectifier RI, brush lOl of Dl, wire ml; b23, brush CS2 of S2, pole of U2.

The lower winding of BI has a resistance sufficiently high to present the energization of B2 in series therewith through its upper winding and to bring about the release of A2; on the other hand Al, opened at on, is released; Cl and C2,

are not energized rapidly enough to be energized during the short operation of Al and A2.

What has just been stated would apply in the event B2 would be energized first, the registers being identical; if BI and B2, which control each other, would open their contacts exactly at the same time, the first which is released can no more be energized, whereas the other is.

I claim:

In an automatic-switching, distant-communication exchange: several registers each of which contains at least one marking device, several selectors each of which has a driving magnet, a marking wire multiplied on the homologous contact studs of the marking devices of the registers and on the homologous contact studs of the selectors, and, in each register, the following parts: connected in series, the brush of the marking device, a first extremity of a winding of a first re lay, said winding, the second extremity of said winding, a rest contact of this relay, an armature of a second, two-winding relay, the rest contact of said armature, a first pole of an electrically insulated battery, said battery, the second pole of said battery and the brush of a selector; shunted on the second extremity of the winding of said first relay and said armature, a winding of said second relay; shunted on said armature and the rest contact of said armature, a condenser and a resistance mounted in series;

shunted in series on said first extremity of said winding of the first relay and said second pole of the battery, a rectifier and the second winding of said second relay; a third relay controlled by the operation of said first relay and whose operation controls the operation of said driving magnet; the resistance of the winding of said first relay and the resistance of the second winding of said second relay being higher than the resistance of the first winding of said second relay, and said third relay being so slowoperating that it only operates when said first relay is permanently energized.

CONSTANTIN PAPPAZOGLU.

REFERENCES CITED The following references are of record in the file of this patent:

Number Number UNITED STATES PATENTS 

